+5356. [func] Update dnssec-policy configuration statements:
+ - Rename "zone-max-ttl" dnssec-policy option to
+ "max-zone-ttl" for consistency with the existing
+ zone option.
+ - Allow for "lifetime unlimited" as a synonym for
+ "lifetime PT0S"
+ - Make "key-directory" optional.
+ - Warn if specifying a key length does not make
+ sense; fail if key length is out of range for
+ the algorithm.
+ - Allow the use of mnemonics when specifying
+ key algorithm (e.g. "rsasha256", "ecdsa384",
+ etc).
+ - Make ISO 8601 durations case-insensitive.
+ [GL #1598]
+
5355. [func] What was set with --with-tuning=large option in
older BIND9 versions is now a default, and
a --with-tuning=small option was added for small